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nevsk [136]
3 years ago
6

(50 points + brainliest if found useful.)

Mathematics
2 answers:
Alexxandr [17]3 years ago
6 0

Answer:

C

Step-by-step explanation:

9x-4+5x+16=180

14x+12=180

14x=168

x=12

blagie [28]3 years ago
4 0

Answer:

  C)  12

Step-by-step explanation:

Consecutive interior angles are supplementary:

  (9x -4)° +(5x +16)° = 180°

  14x = 168 . . . . . . divide by °, subtract 12

  x = 12 . . . . . . . . divide by 14

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Original price of a CD is $17.50 discount is 50%​
ladessa [460]

Answer:

$8.75

Step-by-step explanation:

To calculate this you could use two methods. The first method is to find out what 10% is and multiply it by 5. The second method is to calculate 50% using the formula.

<u>Method 1:</u>

To work this out you would simply divide 17.50 by 10, which is 1.75. This is because percentages are out of 100 and so by dividing by 10 we are finding out what 10% is. Then you would multiply 1.75 by 5, which is 8.75. Then you would minus 8.75 from 17.50, which is 8.75.

<u></u>

1) Divide 17.50 by 10.

17.50/10=1.75

2) Multiply 1.75 by 5.

1.75*5=8.75

3) Minus 8.75 from 17.50.

17.50-8.75=8.75

4) The new price is $8.75

<u>Method 2:</u>

<u></u>

The formula for percentages is.

\frac{percentage}{100} * amount

<u></u>

To work this out you would first divide 50 by 100, which gives you 0.5. Then you would multiply 0.5 by 17.50, which is 8.75. Then you would minus 8.75 from 17.50, which is 8.75.

1) Divide 50 by 100.

50/100=0.5

2) Multiply 0.5 by 17.50.

17.50*0.5=8.75

3) Minus 8.75 from 17.50.

17.50-8.75=8.75

4) The new price is $8.75.

7 0
3 years ago
Four of the angle of a Pentagon are 70°,90°,100° and 145°. What is the side of a fifth angle?​
dezoksy [38]

Answer: 135°

Step-by-step explanation:

The sum of the angles in a pentagon is equal to 540°, and the sum of the first four angles is 405°.

70 + 90 + 100 + 145 = 405

540 - 405 = 135

6 0
3 years ago
the width of a piece of rectangular land is 5m shorter rhan 1/3 of its length .find the width of the land if the length is 60m,1
aniked [119]

Answer:

If width = 60 m, length = 195 m.

If width = 150 m, length = 465 m.

Step-by-step explanation:

The area of a rectangle is l * w or length times width.

So we can set an equation (letting w = width and x = length)

w = 1/3x - 5

Part 1: width = 60m:

60 = 1/3x - 5

65 = 1/3x

x = 195 m

Part 2: width = 150 m:

150 = 1/3x - 5

155 = 1/3x

x = 465 m

6 0
3 years ago
Please help me answer
Alla [95]

Answer:

No

Step-by-step explanation:

6 0
3 years ago
there are 100 pennies in a dollar what fraction of a dollar is 61 pennies write a fraction decimal and word form
ycow [4]
\bf \begin{array}{ccllll}&#10;dollar&pennies\\&#10;\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\&#10;1&100\\&#10;x&61&#10;\end{array}\implies \cfrac{1}{x}=\cfrac{100}{61}

solve for "x", that's how much
5 0
3 years ago
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